I didn't really follow the program-for awhile I was probably having about 1 shake per day, but I did it while counting calories. I definitely had more than the 2 shakes and one meal per day. I know someone who did the two shakes and one meal a day for awhile-she lost a bunch of weight, but then she got burnt out on it and gained some back. I think it definitely works-just don't be afraid to eat a healthy snack if you're really hungry between meals.